Evaluation of phenotypic and genotypic features of children with distal kidney tubular acidosis
PEDIATRIC NEPHROLOGY, vol.35, no.12, pp.2297-2306, 2020 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 35 Issue: 12
- Publication Date: 2020
- Doi Number: 10.1007/s00467-020-04685-2
- Journal Name: PEDIATRIC NEPHROLOGY
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, BIOSIS, CAB Abstracts, CINAHL, EMBASE, MEDLINE, Veterinary Science Database
- Page Numbers: pp.2297-2306
- Keywords: Children, Distal kidney tubular acidosis, Genetic analysis, Long-term prognosis, MUTATIONS, ATP6V1B1, SUBUNIT, GENE
- Çukurova University Affiliated: Yes
Abstract
Background The present study aimed to assess genotype-phenotype correlations with long-term prognosis in children with distal kidney tubular acidosis (dKTA). The kidney function of children with dKTA could be impaired in the long-term. Methods Thirty-one children with dKTA from 23 families were included in the present study. Demographic features, growth parameters, clinical manifestations, follow-up results, and genetic analysis results of the patients were recorded. Results Eighteen children (58.1%) were male. The median age at diagnosis was 3 months. The median follow-up period was 77 months and the longest was 23.5 years. Eight (28.8%) patients had chronic kidney disease (CKD) stage 2 or 3. Three patients aged 24, 23, and 19 years had CKD stage 3 with an estimated glomerular filtration rate of 54, 57, and 48 mL/min/1.73 m(2), respectively. Thirteen patients had mutations in theATP6V0A4gene, eight had mutations in theATP6V1B1gene, and three had mutations in theSLC4A1gene. There was no significant correlation between molecular diagnosis and CKD. Growth retardation with a height below a standard deviation (SD) score of - 2 was found in 14 patients (45.1%) at the time of diagnosis. The mean height SD score at the last visit was significantly higher in patients who had adequate metabolic control at > 75% of all visits as compared with that in patients who did not. Conclusion Patients with dKTA usually have a good clinical prognosis in childhood with appropriate treatment; however, dRTA is characterized by deterioration of kidney function in adulthood, particularly after puberty.